期刊论文

中文

化工进展

1000-6613

2007

26

9

1294-1298

10.3321/j.issn:1000-6613.2007.09.016

05C001:湖南省社会科学基金 2005KG10-023:衡阳市科学技术发展计划

本校为其他机构

采用超临界CO_2萃取生姜精油,设计了一个突然降压的过程,使生姜块茎的细胞壁破碎,减少过程的传质阻力.通过L18(3~7)正交试验得出其最优的工艺条件为:破碎压力20.0MPa,恒压时间30min,降压速率为10.0MPa/min,萃取压力16.0MPa,萃取温度45℃.在CO_2流量为20.0 m~3/h时,萃取60min可完成操作.与索氏(溶剂)提取法相比,其收率很高(约3.62%);与超临界CO_2萃取法相比,该方法的萃取温度、萃取压力和操作时间有较大降低,产品收率提高1.32倍;据此设计的150 L中试装置,经过4000 h的试运行证明,该装置用于萃取姜油可完全满足工艺要求.

Fine ginger oil was extracted with supercritical carbon dioxide （SC-CO2 ） . A procedure of rapid pressure reduction was designed in order to break the cell wall and reduce the resistance of mass transfer. Using the method of orthogonal design L18 （37）, the optimum parameters were obtained under the fragmentation pressure of 20.0 MPa, isobaric time of 30min, pressure reduction of 10 MPa/min, extraction pressure of 16.0MPa, extraction temperature of 45.0 ℃ and extraction time of 60min when the flux of CO2 was 20 m3/h. Compared with the metho...